TERRIFYING MOMENT WHEN SAVYON FIRED SEVERAL SHOTS AT HIS SON. JENNIFER GANNON HAS MORE ON WHAT HAPPENED THAT DAY. WELL, THE BOY'S MOTHER WAS ON HER WAY TO PICK HER SON UP HERE AT THE YWCA WHERE SHE SAW POLICE EVERY AND LEARNED WHAT HAD HAPPENED. THERE'S ONE IMPORTANT THING YOU SHOULD KNOW, THERE'S NOTHING THAT YOU OR ANYONE CLOSE TO ME COULD HAVE DONE TO PREVENT THE TRAGEDY. THOSE HAUNTING WORDS WERE WRITTEN IN AN E-MAIL MUNI SAVYON SENT HOURS BEFORE HE WALKED INTO THE YWCA, SHOT AND KILLED HIS 9-YEAR-OLD SON JOSHUA AND THEN TOOK HIS OWN LIFE. INVESTIGATORS SAY THE MESSAGE WASN'T RECEIVED UNTIL IT WAS TOO LATE. THE SHOOTING HAPPENED 40 MINUTES INTO AN HOUR LONG SUPERVISED VISIT BETWEEN MOONEY AND HIS SON. THERE WERE SEVEN SHOTS FIRED IN TOTAL. MUNI SAVYON UNZIPPED A BLACK BAG HE HAD, TOOK OUT A HAND GUN AND FIRED THE FIRST SHOT. AFTER THAT HE STOOD OVER HIS SON AND FIRED SEVERAL MORE TIMES BEFORE HE FIRED THE GUN ON HIMSELF. SAVYON WAS GRANTED SUPERVISED VISITATION AFTER AN EARLIER ARREST WHEN HE THREATENED HIS SON AND THE BOY'S MOTHER. WATCHING THAT VIDEO THERE'S NOTHING THAT WOULD INDICATE THAT ANY KIND OF VIOLENCE WAS GOING TO HAPPEN. 40 MINUTES YOU SAW A FAWR AND SON INTERACT. FOLLOWING THE SHOOTING INVESTIGATORS LOOKED CLOSELY AT HOW SAVYON WAS ABLE TO GET A GUN INTO THE YWCA. A WORKER TOLD INVESTIGATORS THAT MUNI SAVYON HAD BEEN SEARCHED WITH A METAL DETECTOR IN THE PAST AND WHEN IT WENT OFF HE BLAMED IT ON OTHER ITEMS IN HIS BAG. HE DID HAVE A PRACTICE OF USING A SMALL WAND ON PEOPLE, A METAL DETECTOR, THAT THEY USED THAT AT TIMES TO DETERMINE IF PEOPLE HAD WEAPONS. THEY ALSO ADVISED US IT WASN'T SOMETHING THEY DID ALL THE TIME AND UNFORTUNATELY IT WASN'T DONE IN THIS CASE. AS FOR THEIR METAL DETECTOR POLICY, AN EMPLOYEE HERE TOLD POLICE NAY NO LONGER HAVE A DETAIL OFFICER, AND EMPLOYEES WEREN'T SURE WHAT TO DO IF THEIR WAND DID DETECT A WEAPON IN THE